Happy Mittal
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 Apr 8 awarded Yearling Jan 30 awarded Popular Question Sep 22 comment fourier series of unknown functions Ok, if I have discrete samples of a function, then why do I need to find it's DFT ? Also, in general, in real life, whenever we have to find fourier series of a function, then we have to have that function, and if we already have that function, then why do we need to find its fourier series ? Sep 22 asked fourier series of unknown functions Sep 21 awarded Famous Question Jun 18 awarded Teacher Jun 11 awarded Popular Question May 31 awarded Favorite Question May 1 awarded Popular Question Sep 24 awarded Autobiographer Aug 29 awarded Notable Question Jul 16 awarded Yearling Jul 2 awarded Curious Jun 25 comment number of ways to stack n distinct objects into k distinct boxes Ok, so from stars and bars, we can place k-1 dividers in $^{n+k-1}C_{n-1}$ ways, and then multiply it by n! ? Jun 25 asked number of ways to stack n distinct objects into k distinct boxes May 21 accepted Why does $\sin(0)$ exist? May 14 awarded Popular Question May 14 awarded Nice Question May 14 comment Why does $\sin(0)$ exist? I understand sine definition from unit circle, but that "y coordinate" definition itself comes from triangle formed, right ? If not, then how y-coordinate was chosen for definition for sine ? May 14 comment Why does $\sin(0)$ exist? @GrahamKemp : But doesn't that definition of $\sin(\alpha)$ come from the triangle formed there in the circle?